@mixin clearfix{
	zoom:1;
	&:after{
		display:block;
		content:"";
		height:0;
		clear:both;
	}
}

body {
	ul{
		list-style-type:none;
		@include clearfix;
		li{
			float:left;
			padding:0;
			margin:0;
			a{
				padding:5px;
			}
		}
	}
}